Provide an operational definition of intelligence, Discussion Questions help

Please answer each question separately in 150 words or more per question. Both answers must be in APA format and have at least 1 source cited per question.

1. Provide an operational definition of intelligence. What is the role of operational definitions within quantitative research? What are the strengths and weaknesses of operational definitions within psychology research?

2. In some quantitative studies the terms “external validity” and “generalizability” are portrayed as synonymous. In contrast, Reichardt (2011) makes the claim that external validity and generalizability should be considered distinct concepts. What is external validity? What are the merits of distinguishing between external validity and generalizability of quantitative results?